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(Referência obtida automaticamente do SciELO, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Acute effects of expiratory positive pressure on autonomic cardiac modulation during spontaneous and slow deep breathing in COPD patients

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Autor(es):
ANDRÉA L.G. DA SILVA ; CÁSSIA L. GOULART ; KAMILA M.K. MANSOUR ; GUILHERME D. BACK ; RAMONA CABIDDU ; RENATA TRIMER ; AUDREY BORGHI-SILVA
Número total de Autores: 7
Tipo de documento: Artigo Científico
Fonte: Anais da Academia Brasileira de Ciências; v. 92, n. 2, p. -, 2020.
Resumo

Abstract Aim: to evaluate the acute effects of expiratory positive airway pressure on cardiac autonomic modulation in chronic obstructive pulmonary disease patients during spontaneous breathing and slow deep breathing. Methods: 17 patients were evaluated. The R-R intervals were collected (Polar® S810i) during spontaneous breathing (10 minutes) and slow deep breathing (4 minutes), with and without 5 cmH2O expiratory positive airway pressure. Stable signals were analyzed by Kubios®. Heart rate variability indices were computed in time domain and in frequency domain. Results: Expiratory positive airway pressure application affected low frequency (spontaneous breathing: 62.5±4.1 vs slow deep breathing: 28.2±4.2, p<0.001) and high frequency (spontaneous breathing: 37.4±17.3 vs slow deep breathing: 58.9±18.1, p<0.001). Interactions were observed between expiratory positive airway pressure effect and slow deep breathing effect for low frequency (p<0.001), high frequency (p<0.001) and low frequency/high frequency ratio (p<0.001). When patients were stratified by disease’s severity, we identified a significant low frequency reduction (p<0.001) and high frequency increase (p<0.001) for all stages when slow deep breathing was associated with expiratory positive airway pressure. Conclusion: A 5 cmH2O expiratory positive airway pressure during spontaneous and slow deep breathing can elicit an acute response, resulting in a cardiac autonomic control improvement in moderate-to-very severe patients. (AU)

Processo FAPESP: 13/23013-0 - Analise da variabilidade da frequência cardíaca e do acoplamento cardiorrespiratório na coexistência da doença pulmonar obstrutiva crônica e da síndrome da apnéia obstrutiva do sono
Beneficiário:Renata Trimer
Linha de fomento: Bolsas no Brasil - Pós-Doutorado
Processo FAPESP: 15/04101-1 - Efeitos clínicos, funcionais e sistêmicos da estimulação elétrica neuromuscular corpórea no pós-operatório de cirurgia bariátrica.
Beneficiário:Audrey Borghi e Silva
Linha de fomento: Auxílio à Pesquisa - Regular